CVE-2021-4235

Aliases:GHSA-r88r-gmrh-7j83GO-2021-0061DEBIAN-CVE-2021-4235CGA-53g5-qgvr-h4v4CGA-994q-qx3m-5656CGA-h5q4-fx4j-7rj7CGA-hwqg-pw69-4jf5CGA-mr94-5rrg-jpf9CGA-66qj-29fg-rh22CGA-qhh4-9487-wc4mCGA-xwwm-h373-599j
Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 27 Dec 2022, 21:13
Last modified:11 Apr 2025, 16:25

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.41% LOW
0% probability +0.36%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

27 Dec 2022, 21:13
Published
Vulnerability first disclosed
11 Apr 2025, 16:25
Last Modified
Vulnerability information updated

Description

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.41%• Percentile: 36%

Affected Systems

  • chainguard•dex-k8s-authenticator

    < 1.4.0-r34

  • chainguard•k3d

    < 5.6.0-r11

  • chainguard•k3d-proxy

    < 5.6.0-r11

  • chainguard•k3d-tools

    < 5.6.0-r11

  • wolfi•k3d

    < 5.6.0-r11

  • wolfi•k3d-proxy

    < 5.6.0-r11

  • wolfi•k3d-tools

    < 5.6.0-r11

  • debian•golang-yaml.v2

    < 2.2.8-1 | < 2.2.8-1 | < 2.2.8-1 | < 2.2.8-1

  • github.com/go-yaml•yaml

    all | ≤ 2.1.0

  • gopkg.in•yaml.v2

    < 2.2.3

  • gopkg.in/yaml.v2•gopkg.in/yaml.v2

    < 2.2.3

  • yaml_project•yaml

    < 2.2.3

References (7)